public async Task WrongKeyAsync()
        {
            var manager = KeyValueManagerTests.BuildCase1();

            manager.TTL  = TimeSpan.FromSeconds(2);
            manager.Path = "path";
            var resolver = new KeyValueResolver(manager)
            {
                Key = "B"
            };

            var result = await resolver.GetConfigurationAsync();

            Assert.Null(result);
        }
        public async Task DefaultAsync()
        {
            var manager = KeyValueManagerTests.BuildCase1();

            manager.TTL  = TimeSpan.FromSeconds(2);
            manager.Path = "path";
            var resolver = new KeyValueResolver(manager)
            {
                Key = "A"
            };

            Assert.Equal("A", resolver.Key);

            var result = await resolver.GetConfigurationAsync();

            Assert.Equal("default-value", result);
        }